EP 0716528 B1 20020918 - Acquisition of carrier phase and symbol timing through joint estimation of phase and timing adjustments
Title (en)
Acquisition of carrier phase and symbol timing through joint estimation of phase and timing adjustments
Title (de)
Rückgewinnung der Trägerphase und des Symboltakts durch Abschätzung der Phase und des Takts
Title (fr)
Acquisition de la phase de la porteuse et de la synchronisation de symbole par estimation d'adjustements de phase et d'horloge
Publication
Application
Priority
US 35179794 A 19941208
Abstract (en)
[origin: EP0716528A2] A signal acquisition system rapidly acquires carrier phase and symbol timing of a received PSK-modulated communication signal (24) having a 110-symbol pattern through joint estimation of carrier-phase adjustment and symbol-timing adjustment by processing a common set of sampled data. A reference signal (22) at a local oscillator frequency is mixed with a received communication signal (24) to provide the communication signal (26) at an intermediate frequency. The intermediate-frequency communication signal (26) is converted into a digital communication signal (28), which is formatted into in-phase (I) and quadrature-phase (Q) components. A sampling circuit (18) samples the I components at twice a predetermined symbol rate to provide a first series of I-component samples at the predetermined symbol rate and a second series of I-component samples that are intermediate to the first series of I-component samples and at the predetermined symbol rate, and for sampling the Q components at twice the predetermined symbol rate to provide a first series of Q-component samples at the predetermined symbol rate and a second series of Q-component samples that are intermediate to the first series of Q-component samples and at the predetermined symbol rate. A processor (20) processes the samples to estimate a phase-adjustment value phi A and a symbol-timing-adjustment value STA. The phase of the reference signal (22) is adjusted in accordance with the phase-adjustment value phi A and the timing of the sampling is adjusted in accordance with the symbol-timing-adjustment value STA. <IMAGE>
IPC 1-7
IPC 8 full level
H04L 7/033 (2006.01); H04L 27/227 (2006.01)
CPC (source: EP US)
H04L 7/0334 (2013.01 - EP US); H04L 27/2272 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT NL
DOCDB simple family (publication)
EP 0716528 A2 19960612; EP 0716528 A3 19980930; EP 0716528 B1 20020918; CN 1080052 C 20020227; CN 1136251 A 19961120; DE 69528240 D1 20021024; DE 69528240 T2 20030515; ES 2180616 T3 20030216; MY 112310 A 20010531; US 5544200 A 19960806
DOCDB simple family (application)
EP 95650044 A 19951127; CN 95121429 A 19951208; DE 69528240 T 19951127; ES 95650044 T 19951127; MY PI19953767 A 19951206; US 35179794 A 19941208